During a lecture on inductors a student asked whether we can find an inductor in a radio set. After a quick research I can provide the following information:
Tuned circuits, like the ones used in radio sets, mainly consist of an inductor and a variable capacitor. The main purpose of a tuned circuit is to tune in radio stations on a particular frequency while rejecting all others. Impedance levels dictate whether the set is tuned or not. At its resonant frequency a tuned circuit has a very high impedance. Impedance is lower at other frequencies.
When a radio set is tuned, the inductor and the capacitor have the same reactance while the current flowing through both devices is the same.